Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos clubes restam na quarta rodada?
 ###Tabelas: CREATE TABLE world_records (world_records_id AUTO_INCREMENT PRIMARY KEY, Distance VARCHAR, Event VARCHAR, Time VARCHAR, Meet VARCHAR, Location VARCHAR) CREATE TABLE atari_5200 (atari_5200_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Current version VARCHAR, System VARCHAR, Platform VARCHAR, License VARCHAR) CREATE TABLE teams (teams_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Clubs remaining INT, Clubs involved INT, Winners from previous round VARCHAR, New entries this round VARCHAR, Leagues entering at this round VARCHAR) CREATE TABLE second_qualifying_round (second_qualifying_round_id AUTO_INCREMENT PRIMARY KEY, Team 1 VARCHAR, Agg. VARCHAR, Team 2 VARCHAR, 1st leg VARCHAR, 2nd leg VARCHAR) CREATE TABLE series_ratings (series_ratings_id AUTO_INCREMENT PRIMARY KEY, Season INT, # of Episodes INT, Timeslot VARCHAR, Season Premiere VARCHAR, Season Final VARCHAR, Peak Audience INT, Average Audience INT, Average Nightly Rank VARCHAR, Average Weekly Rank VARCHAR, Average Yearly Ranking VARCHAR)  
SELECT MIN Clubs remaining FROM teams WHERE Round = Fourth round